Landfill　leachate　as　the　research　object,　the　organics　and　nitrogen　removal　characteristics　of　UASBdecarbonize-integrated　ANAMMOX　process　were　studied.　The　results　showed　that:　the　process　can　achieve　efficient　carbon　removal.　With　the　influent　COD　concentration　of　6210-16365　mg/L,　TN　concentration　of　990-2100　mg/L,　the　effluent　COD　concentration　was　655　mg/L,　the　minimum　effluent　TN　concentration　was　39.9　mg/L.　Influent　biodegradable　COD　were　mainly　removed　in　UASB　and　decarbonize　tank.　The　removal　efficiency　was　respectively　59%　and　31%.　while　the　left　inert　organic　substances　flowed　into　the　integration　ANAMMOX　tank.　TN　removal　took　place　in　decarbonizes　and　integrated　ANAMMOX　tank.　TN　removal　in　decarbonize　tank　accounted　for　53%,　which　was　mainly　through　denitrification　and　simultaneous　nitrification　and　denitrification　removal.　TN　removal　in　ANAMMOX　tank　accounted　for　46%,　which　was　mainly　through　the　synergy　of　AOB　and　AnAOB.　When　the　effluent　of　decarbonize　tank　contained　biodegradable　organic　matters,　the　autotrophic　nitrogen　removal　process　in　the　subsequent　integration　ANAMMOX　tank　was　inhibited　seriously.　Full　degradation　of　organics　in　decarbonize　tank　is　the　key　factor　for　effective　nitrogen　removal　in　the　whole　system.